Contact

Questions, feedback, bug reports, or feature ideas - we'd love to hear from you.

What to include

A little context helps us reproduce a calculation, check a correction or answer a question quickly.

For a calculation question, include the material, dimensions, depth and unit system you used.
For a bug report, include the page URL, browser and what you expected to happen.
For a correction, point to the sentence, number or label that needs attention.

Please do not send payment details or other sensitive information.